Feature: 1. Ultra Low Frequency: Schumann waves are ultra low frequency electromagnetic waves that penetrate matter and are not free radiation. It can help improve concentration, focus and mental clarity. 2. Promote Energy Boost: Schumann Waves are a nature energy source, anyone who can easily resonate with Schumann Waves will be energized, refreshed and healthy, promoting relaxation and calmness. 3. Working Principle: Through the recognized resonance of Schumann wave electromagnetic field and human cell frequency, it maintains the overall balance of human meridians, thus reducing the damage caused by non electrical potential radiation. 4. Simulated Magnetic Field: When simulating a nature regenerative magnetic field by electronic means, such as using a square wave generator to generate an artificial 7.83Hz Schumann wave frequency instead of the nature Schumann wave. 5. Professional: The pulse generator induces a resonance in the body's frequency, supplementing the nature geomagnetic field, artificially weakening the electromagnetic field electric potential interference, and balancing the cell membrane potential. Specification: Item Type: Schumann Generator Material: ABS Output Voltage: DC5V, 0.08A Output Frequency: 7.83Hz Built in Polymer Lithium Battery: 2000mAh. Package List: 1 x Schumann generator1 x Charging Cable